70020621 has 12 divisors (see below), whose sum is σ = 110335680. Its totient is φ = 42436680.

The previous prime is 70020617. The next prime is 70020631. The reversal of 70020621 is 12602007.

It is a happy number.

It is not a de Polignac number, because 70020621 - 2² = 70020617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70020594 and 70020603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70020611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 353541 + ... + 353738.

It is an arithmetic number, because the mean of its divisors is an integer number (9194640).

Almost surely, 2^70020621 is an apocalyptic number.

It is an amenable number.

70020621 is a deficient number, since it is larger than the sum of its proper divisors (40315059).

70020621 is a wasteful number, since it uses less digits than its factorization.

70020621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707296 (or 707293 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 70020621 is about 8367.8325150543. The cubic root of 70020621 is about 412.1689950668.

Adding to 70020621 its reverse (12602007), we get a palindrome (82622628).

It can be divided in two parts, 700 and 20621, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 70020621 in words is "seventy million, twenty thousand, six hundred twenty-one".